a) there is a one-way flow of electrons from photosystem I to photosystem II, b) ATP alone is produced, c) hydrogen ions accumulate in the thylakoid compartments, d)only electrons are transferred to hydrogen acceptors, e) water is not involved in any of the reactions. Learn biology photosynthesis light 1 plants with free interactive flashcards. a) formation of ATP, b) energizing of an electron of chlorophyll by a photon of light, c) splitting of water into H and O components, d) addition of CO2 to a five-carbon sugar, e) combining of two molecules of PGAL to form a molecule of glucose. For chlorophyll molecules that have been extracted from chloroplasts in the lab, this absorbed light energy is rapidly released, allowing the electron to return to its initial "ground" energy state. In the dark reactions of photosynthesis, __________. The C4 pathway requires two different light-driven events, whereas the C3 pathway requires only one. The oxygen in our atmosphere is a product of ______. A) corn, b) pine, c) sugarcane, d) crabgrass, e) all except b. In photosynthetic prokaryotes, it is located in membranes within cytoplasm or, in some cases, directly in the plasma membrane. Crash Course Biology 8 Photosynthesis Flashcards Quizlet from o.quizlet.com 2 photosynthesis video as you watch, consider the following: Carbon dioxide + water + solar energy → glucose + oxygen. It transfers electrons that allow carbohydrates to be synthesized from CO2. However, it takes great deal of energy to pull electrons from water, the amount of energy that a single photosystem can capture from sunlight just not enough to pull an electron from water and produce an electron donor capable of reducing NADP+. The C4 pathway involves ______. The chemical equation for photosynthesis can be represented like this: 6 CO2 + 6 H2O → C6H12O6 + 6 O2 You can interpret this equation to mean that carbon dioxide (or CO2) and H2O (or water) are used to create C6H1206 (or suga… One of the three-carbon molecules of G3P leaves the cycle to become a part of a carbohydrate molecule. Products of the Calvin cycle, or dark reactions, include _____? a) the splitting of CO2 during photosynthesis, b) cyclic photophosphorylation, c) noncyclic photophosphorylation, d) both cyclic and noncyclic photophosphorylation, e) the Calvin cycle. In eukaryotic cells, photosynthesis takes place in the chloroplast. TL;DR (Too Long; Didn't Read) Light-dependent reactions change light energy to chemical energy in the first stage of photosynthesis. The energy supplied by the first photosystem allows electrons to be pulled from water, and the energy supplied by the second photosystem step allows electrons to be transferred to NADP+. Most chlorophyll molecules function as antenna: Energy is transferred between chlorophyll molecules until it is finally transferred to a specially configured pair of chlorophyll molecules known as the reaction center. What is the source of the electrons that reduce NADP during photosynthesis? What is the importance of the mitochondria? b) produce carbohydrate, c) provide the energy required for the dark reactions, d) use O2 in the production of ATP, e) include two of the above. The electron-transport molecules of photophosphorylation are ___________. For chlorophyll molecules with an intact chloroplast, energy can be transferred to an adjacent chlorophyll molecule instead of being lost as heat. A net energy drain: It results in the oxidation and loss, in the form of CO2, of carbon atoms that had previously been incorporated and reduced by the Calvin cycle, and second, it consumes ATP. Under conditions of high light intensity, intense heat, and dryness, a C4 plant would ____________. ... What happens to the remaining G3P molecules in the last step of the dark reactions? An enzyme that adds O2 to another molecule is called an oxygenase. Learn. Four of the five answers listed below are processes associated with light-independent reactions. a) chemiosmotic theory, b) photosystem mechanism, c) process of photolysis, d) electron transfer system, e) cyclic pathway. Photosynthesis most evident to us: Carried out by land plants such as trees, grasses, shrubs. What are the two challenges to photosynthesis efficiency? Photosynthesis is a multi-step process that requires sunlight, carbon dioxide, and water as substrates. The Calvin Cycle. If these accumulate in the cell, they would cause water to enter the cell by osmosis, which would cause damage to the cell. Overview of Photosynthesis. Has this changed? Form structures that resemble flattened sacs, and these sacs are grouped into structures called grana. Corn arose in the tropics and therefore is a ___________ plant. STUDY. Select the exception. Choose from 500 different sets of biology photosynthesis light 1 plants flashcards on Quizlet. light energy(photon) is converted into chemical energy. Carries electrons from the cytochrome complex to P1 by diffusing through the thylakoid lumen. Subsequent dark reactions can take place in the absence of light and are used by the plant to produce chemicals it can use in its biological … Calvin cycle: The Incorporation of CO2 is catalyzed by the enzyme rubisco. Most of the fossil fuels come from passed/ancient __________. provide the energy required for the dark reactions. The first event in photosynthesis is the _________. Photosynthesis Process Step by Step. The process of noncyclic photophosphorylation provides these requisites, using light energy to synthesize _________. Most carbon enters the web of life through _____________. Three of the four answers listed below are C4 plants. All but which condition must be present for light-independent reactions to occur? Learn about photosynthesis step-by-step with this quick study guide. thylakoid membranes of chloroplasts Which one of the following would be least likely to be a limiting factor for photosynthesis? Match. Absorb some wavelengths of visible light. a) Two different light-driven events are necessary if electrons are to be moved allthe way from H2O to NADP, b) The pigment molecules that trap light energy are built into the thylakoid membranes, c) There are at least two different places in the overall noncyclic pathway where energized electrons are passed energetically downhill via a series of electron-carrier substances, d) One of the products of noncyclic photophosphorylation that help make possible the dark reactions of the Calvin cycle is NADPH, e) Some of the energy released during electron transport is used to hydrolyze ATP to ADP and inorganic phosphate. Which process releases electrons to fill "holes" in chlorophyll in noncyclic photophosphorylation? photosynthesis formula. The biochemical pathway used in photosynthesis to synthesize carbohydrates from CO2. provide the electrons needed to reduce NADP. water is not involved in any of the reactions. a) red, b) orange, c) yellow, d) green, e) blue. University. Consists of large, light absorbing "head" containing a magnesium atom at its center and a long hydrocarbon "tail". order of events in calvin cycle. For each six atoms of carbon dioxide fixed in the light-independent reactions, how many molecules of PGAL (phosphoglyceraldehyde) are produced? Now that we have that out of the way, let’s look at the 4 main steps of photosynthesis: Step 1 The plant takes in carbon dioxide in the atmosphere through the stomata on its leaves. A hole in the semiconductor sense of the word, a missing electron from the chemical-bond electrons. The two stages of photosynthesis are light reactions and the Calvin cycle; light reactions take place first, forming the photo portion of photosynthesis, while the Calvin cycle follows, completing the cycle with several steps involving photosynthesis. Introductory Biology I … The result of O2 added instead of CO2 is one molecule with three carbon atoms and one molecule with only two carbon atoms. a) changes to carotene, b) becomes agitated and moves rapidly, c) becomes radioactive, d) absorbs the energy and moves an electron to a higher energy state, e) becomes ionized. Concluded that trees gain most of their mass by storing water. Water donates electrons to one end of the ETC, whereas NADP+ accepts electrons at the other end. In turn, the movement of electrons through this transport chain produce ATP and NADPH. Flashcards. Learn about photosynthesis with free interactive flashcards. Key Concepts: Terms in this set (9) Photosynthesis. Stomata open and close in relation to water conditions. The resulting six-carbon compound is broken down into two three-carbon compounds, and the energy in ATP and NADPH is used to convert these molecules into G3P. How many molecules of PGAL (phosphoglyceraldehyde) are used to regenerate the six molecules of RuBP (ribulose bisphosphate)? If photosynthesizing green algae are provided with CO2 synthesized with heavy oxygen ('80), later analysis will show that all but one of the following compounds produced by the algae contain the '80 label. ribulose 1,5-bisphosphate: (RuBP) A molecule that completes the first and last steps of the Calvin cycle, which creates sugar out of carbon dioxide. The carbon source for organisms that derive their energy from photosynthesis is ________. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Describe this. Photosynthesis takes place through several steps which occur during two stages: the light phase and the dark phase. 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